POLYPHONY : Monophonic - OSCILLATORS : 1 VCO with PWM and tuning from 10Hz to 10kHz, External Sound-In jack (Synthesizer 101 and Expander 102), White/Pink Noise (Model 101), Ring Modulator (Model 102) - FILTER : High-Pass filter, Low-Pass filter (Synthesizer 101 and 102 Expander) - VCA : ADSR envelopes (Synthesizer 101 and 102 Expander) - KEYBOARD : 37 keys (Synthesizer 101 only) -ARPEG/SEQ : 12 x 2 step sequencer, variable gate times, series or parallel configurations (Sequencer 104) -CONTROL : CV / GateDATE PRODUCED - 1975-1979